Am 19.04.21 um 16:30 schrieb Laurent Vivier:
Le 19/04/2021 à 12:39, Stefan Weil a écrit :
I can confirm the issue also with latest official QEMU sources.
Related issue URLs:
https://github.com/tesseract-ocr/tesseract/issues/2838
https://bugs.launchpad.net/qemu/+bug/1924912
Instructions and files required to reproduce the issue:
https://qemu.weilnetz.de/test/bugs/1924912/
Michael, Laurent, maybe you have an idea how to narrow down this issue?
Could it be related to the number of file descriptors that can differ
between linux an windows?
We have a series of patches that sets the number of queues to the number
of vCPU:
a4eef0711b2c vhost-user-blk-pci: default num_queues to -smp N
9445e1e15e66 virtio-blk-pci: default num_queues to -smp N
6a558822849f virtio-scsi-pci: default num_queues to -smp N
4e5163bd8444 virtio-scsi: introduce a constant for fixed virtqueues
1436f32a84c3 virtio-pci: add virtio_pci_optimal_num_queues() helper
And I think it can have inpact on the number of open file descriptors.
You can try by specifiying "num_queues=1" with the virtio interfaces on the
QEMU command line.
(ot choose a machine type earlier than 5.2)
Thanks,
Laurent
I tried different machine types. That did not help.
The full command line which did not work was this one:
qemu-system-i386 -s -m 512M -cpu max -d guest_errors -smp 2 -device
VGA,vgamem_mb=64 -drive file=_disk_image,format=raw,index=0,media=disk
-device ich9-ahci -usb -device virtio-serial -chardev
stdio,id=stdout,mux=on -device virtconsole,chardev=stdout -device
isa-debugcon,chardev=stdout -device virtio-rng-pci -soundhw pcspk
-device sb16 -netdev
user,id=breh,hostfwd=tcp:127.0.0.1:8888-10.0.2.15:8888,hostfwd=tcp:127.0.0.1:8823-10.0.2.15:23,hostfwd=tcp:127.0.0.1:8000-10.0.2.15:8000,hostfwd=tcp:127.0.0.1:2222-10.0.2.15:22
-device e1000,netdev=breh -kernel Kernel/Kernel -append hello
QEMU works nicely when I remove "-device virtio-serial" and "-device
virtconsole,chardev=stdout" from that command line. How would I have to
modify those arguments to limit the number of queues?
Thanks,
Stefan
